TGS’ least-squares RTM is the industry-leading depth imaging technology that refines the conventional RTM image toward true reflectivity.
It overcomes the shortcomings of conventional migration algorithms via iterative least-squares inversion in order to gradually correct migration errors. Compared to conventional depth migration algorithms, LSRTM generates superior seismic images with the advantages including balanced amplitudes,
Zeng C., S. Dong, and B. Wang, 2014, “Least-squares reverse time migration: Inversion-based imaging toward true reflectivity”, The Leading Edge, 33(9), 962–964, 966, 968.
Zeng C., S. Dong, and B. Wang, 2016, “Adaptive least-squares RTM with applications to subsalt imaging”, The Leading Edge, 35(3), 253-257.